sysdeps/unix/sysv/linux/ftruncate.c

   1 /* Copyright (C) 2016-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <unistd.h>
  19 #include <sysdep.h>
  20 #include <errno.h>
  21
  22 #ifndef __OFF_T_MATCHES_OFF64_T
  23 /* Truncate the file FD refers to LENGTH bytes.  */
  24 int
  25 __ftruncate (int fd, off_t length)
  26 {
  27 # ifndef __NR_ftruncate
  28   return INLINE_SYSCALL_CALL (ftruncate64, fd,
  29                               __ALIGNMENT_ARG SYSCALL_LL (length));
  30 # else
  31   return INLINE_SYSCALL_CALL (ftruncate, fd, length);
  32 # endif
  33 }
  34 weak_alias (__ftruncate, ftruncate)
  35 #endif